1/1x2+1/2x3.1/99x100
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![1/1x2+1/2x3.1/99x100](/uploads/image/z/1664184-48-4.jpg?t=1%2F1x2%2B1%2F2x3.1%2F99x100)
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1/1x2+1/2x3.1/99x100
1/1x2+1/2x3.1/99x100
1/1x2+1/2x3.1/99x100
原式=1/1-1/2+1/2-1/3+……+1/99-1/100
=1-1/100=99/100
1/1x2+1/2x3.............1/99x100
=1-1/2+1/2-1/3+.........+1/99-1/100
=1-1/100
=99/100
1/1x2+1/2x3.1/99x100
1x2+2x3+3x4+.99x100=?
1X2+2x3+3x4+...99x100 =
1x1+2x2+3x3...+100x100
1X2分之1+2X3分之1+3X4分之1+.+99X100分之1
1分之1x2+1分之2x3+1分之3x4.+1分之99x100
1/1x2+1/2x3+1/3x4+...+1/99x100
1/1X2+1/2X3+1/3X4+.+1/99X100=?简便算法?
1/1x2+1/2x3+1/3x4.1/99x100.
1/1x2+1/2x3+···+1/99x100
1x2分之1+2x3分之1+.99x100分之1等于几
1x2分之1+2x3分之1+.99x100分之2等于几
1x2分之一+2x3分之一+3x4分之一+4x5分之一```````99x100分之一=?
1x2+2x3+3x4+4x5+5x6---+99x100=?
1x2分之一+2x3分之一+3x4分之一+...+99x100分之一等于多少
计算1x2+2x3+3x4+4x5+...+99x100
1x2+2x3+3x4+4x5+5x6+.+99x100
计算1x2+2x3+3x4+……+99x100=?